The K_(sp) of Ag_(2)CrO_(4), AgCl, AgBr and AgI are respectively, 1.1 xx 10^(-12), 1.8 xx 10^(-10), 5.0 xx 10^(-13), 8.3 xx 10^(-17). Which one of the following salts will precipitate last if AgNO_(3) solution is added to the solution containing equal moles of NaCl, NaBr, NaI and Na_(2)CrO_(4)

The K_(sp) of Ag_(2)CrO_(4), AgCl, AgBr and AgI are respectively, 1.1

1.	The K_(sp) of Ag_(2)CrO_(4), AgCl, AgBr and AgI are respectively, 1.1 xx 10^(-12), 1.8 xx 10^(-10), 5.0 xx 10^(-13), 8.3 xx 10^(-17). Which one of the following salts will precipitate last if AgNO_(3) solution is added to the solution containing equal moles of NaCl, NaBr, NaI and Na_(2)CrO_(4)
Answer» AgCl AgBr `Ag_(2)CrO_(4)` AgI Solution :`{:(K_(sp) " of " Ag_(2)CrO_(4),,= 1.1 xx 10^(-12)),(K_(sp) " of " AgCl,,= 1.8 xx 10^(-10)),(K_(sp) " of " AgBr,,= 5.0 xx 10^(-13)),(K_(sp) " of "AgI,,= 8.3 xx 10^(-17)),([Ag^(+)]^(2)[C],,= 1.1 xx 10^(-12)):}` `[Ag^(+)] = sqrt((1.1 xx 10^(-12))/([C]))` If we take [C] = 1 then the MAXIMUM requirement of `[Ag^(+)]` will be CASE of `Ag_(2)CrO_(4)`